A moving coil galvanometer has 10 turns each of length 12 cm and breadth 8 cm the coil of MCG carries a current of 125 `mu` A The coil is kept perpend
A moving coil galvanometer has 10 turns each of length 12 cm and breadth 8 cm the coil of MCG carries a current of 125 `mu` A The coil is kept perpendicular to uniform magnetic field of induction `10^(-2)` T the twis t constant of phosphor bronz fibre is `12xx10^(-9)` Nm/degree calculate the defection produced
A. `10^(@)`
B. `20^(@)`
C. `30^(@)`
D. `60^(@)`
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Given `n=10 l =12 cm =12cm =12xx10^(-2) m`
`b=8 cm =8xx10^(-2)m B=10^(-2)T`
`I=12 muA=125 xx10^(-6)A`
`C=12xx10^(-19) "Nm/degree"`
`alpha` =?
current flowing through coil of moving coil gavanometer
`I=(C )/(nBa)alpha`
`alpha=(nBA)/(C )I`
`alpha=(10xx10^(-2)xx12xx10^(-2)xx8xx10^(-2)xx125xx10^(-6))/(12xx10^(-9))`
`alpha =10^(@)`
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